Merlin blinks at that, momentarily confused. A chance in demeanor? He hadn't thought he'd changed much in regards to their occasional encounters, as even if he derived no extra benefit from it, going through the motions was at least better than nothing. Probably.

It's only after a brief moment of thought that what she might possibly mean occurs to him.

"Incubi don't possess emotions of their own. Only a copy from the humans they feed on. If that spoils your experience, then you're free to call things off, of course."